Atmosphere relief valve combined silencer used for nuclear power station

The utility model relates to an atmosphere relief valve combined silencer used for a nuclear power station, and belongs to the technical field of nuclear power equipment manufacturing. The atmosphere relief valve combined silencer comprises a support, a large sealing head and a silencing tube shell which are installed from the bottom to the top in turn. The large sealing head is provided with a pipe body. The wall body of the pipe body is provided with multiple through holes. The upper end of the pipe body stretches into the silencing tube shell, and the lower end of the pipe body stretches into the support. A small sealing head is packaged on the position, which is arranged at the port in the silencing tube shell, of the pipe body. An inlet flange is installed on the position, which is arranged at the port in the support, of the pipe body. The silencing tube shell is internally provided with a first perforated plate with multiple first through holes, a second perforated plate with multiple second through holes,..., and an Nth perforated plate with multiple Nth through holes which are installed from the bottom to the top in turn, and the aperture of the through holes> the aperture of the first through holes> the aperture of the second through holes>...> the aperture of the Nth through holes. An outlet screen cover is installed at an air outlet above the silencing tube shell. The atmosphere relief valve combined silencer used for the nuclear power station is great in the silencing effect, great in structural stability, convenient for maintenance and long in the service life.